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60V, 100mA, Ultra-Small, High-Efficiency,
Synchronous Step-Down DC-DC Converter
with 22μA No-Load Supply Current
MAX17552/MAX17552A/
MAX17552B
General Description
Benefits and Features
The Himalaya series of voltage regulator ICs, power
modules, and chargers enable cooler, smaller, and
simpler power-supply solutions. The MAX17552/
MAX17552A/MAX17552B high-efficiency, high-voltage,
Himalaya synchronous step-down DC-DC converters
with integrated MOSFETs operate over a 4V to 60V input
voltage range. The converters can deliver output current
up to 100mA at output voltages of 0.8V to 0.9 x V . The
output voltage is accurate to within ±1.75% over the -40°C
to +125°C temperature range.
●
Eliminates External Components and Reduces Total Cost
• No Schottky—Synchronous Operation for High
Efficiency and Reduced Cost
• Internal Compensation
• Fixed Internal 5.1ms or Programmable Soft-Start
• All-Ceramic Capacitors, Ultra-Compact Layout
● Reduces Number of DC-DC Regulators to Stock
IN
• Wide 4V to 60V Input Voltage Range
• Adjustable 0.8V to 0.9 x V Output Voltages
IN
• Delivers Up to 100mA Load Current
• 100kHz to 2.2MHz Adjustable Switching Frequency
Range with External Clock Synchronization
• Configurable Between PFM and Forced-PWM
Modes
The devices employ a peak-current-mode control
architecture with a MODE pin that can be used to operate
the device in pulse-width modulation (PWM) or pulse-
frequency modulation (PFM) control schemes. PWM
operation provides constant frequency operation at all
loads and is useful in applications sensitive to variable
switching frequency. PFM operation disables negative
inductor current and additionally skips pulses at light
loads for high efficiency. The converters consume only
22µA of no-load supply current in PFM mode. The low-
resistance, on-chip MOSFETs ensure high efficiency at
full load and simplify PCB layout.
● Reduces Power Dissipation
• 22µA No Load Supply Current
• Peak Efficiency > 90%
• PFM Feature for High Light-Load Efficiency
• 1.2μA (typ) Shutdown Current
● Operates Reliably in Adverse Industrial Environments
• Peak Current-Limit Protection
• Built-In Output-Voltage Monitoring with Open-Drain
RESET Pin
• Programmable EN/UVLO Threshold
• Complies with CISPR32 (EN55032) Class B
Conducted and Radiated Emissions
• Monotonic Startup into Prebiased Output
• Overtemperature Protection
• Wide -40°C to +125°C Ambient Operating Temper-
ature Range / -40°C to +150°C Junction Tempera-
ture Range
The devices offer programmable switching frequency
to optimize solution size and efficiency. Programmable
soft-start allows the user to reduce the inrush currents.
During overload, the MAX17552 implements a hysteretic
cycle-by-cycle peak-current-limit protection scheme, while
the MAX17552A/MAX17552B implements a HICCUP-type
overload protection scheme to protect the inductor and
the internal FETs. An EN/UVLO pin allows the user to
turn on/off the device at the desired input-voltage level. An
open-drain RESET pin allows output-voltage monitoring.
The devices operate over the -40°C to +125°C industrial
temperature range and is available in a compact 10-pin
(3mm x 2mm) TDFN/TDFN-CU and 10-pin (3mm x 3mm)
Applications
● Industrial Sensors and Process Control
● 4mA–20mA Current-Loop Powered Sensors
● High-Voltage LDO Replacement
● Battery-Powered Equipment
®
μMAX packages. Simulation models are available.
● HVAC and Building Control
● General-Purpose Point of Load
Ordering Information appears at end of data sheet.
µMAX is a registered trademark of Maxim Integrated Products, Inc.
19-6903; Rev 7; 7/21
©
2021 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners.
One Analog Way, Wilmington, MA 01887 U.S.A.
|
Tel: 781.329.4700
|
© 2021 Analog Devices, Inc. All rights reserved.
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